52results about How to "Easy to observe and study" patented technology

The invention discloses a resource display platform for design teaching in a digital media art environment. The resource display platform comprises a bottom box and a main computer machine cabinet located on one side of the bottom box, and two symmetrically arranged side frames are fixedly installed on the rear side of the upper surface of the bottom box. According to the resource display platformfor design teaching in the digital media art environment, a work display platform is arranged, art design works of students can be placed on the work display platform for display, so that the art design works can be displayed visually, the students can conveniently learn from one other, and the improvement of the interest of learning and communication between the students is facilitated; and courseware works of teachers can further be displayed through a panel display or projection cloth, so that the teachers can display digital media art more dynamic and vividly, better teaching effect can be conveniently achieved, and a display method is versatile to facilitating choosing and using of the teachers for teaching according to actual needs.

The invention relates to a method for determining the pollen viability of watermelon, belonging to the technical field of plant. The invention discloses a method for determining the pollen viability of watermelon by using an in-vitro germination method, and the pollen viability of the watermelon can be effectively determined. An in-vitro pollen germination culture medium used comprises the following components of 200g / L sucrose, 10mg / L H3BO3, 800mg / L Ca(NO3)2.4H2O, and 6.5g / L agar. The method comprises the following steps: evenly sowing pollen into the solid culture medium, and culturing at dark conditions 85% relative humidity at 25DEG C; and after four hours, observing the pollen germination and pollen tube growth situations through an optical microscope. The method is simple, completely quantitative, reliable in data, and strong in operability, has higher practical application values, and achieves important significance on the breeding efficiency of watermelons.

The invention relates to a polycaprolactone (PCL) and polylactic acid (PLA) human body absorbable vascular stent and a preparation method thereof. The two ends of a degradable vascular stent prepared from PCL and PLA fibers are provided with tracing joints with X-ray dominance. The preparation method comprises the following steps of: preparing PCL and PLA as-spun fibers by a melt blended spinning method and stretching the PCL and PLA as-spun fibers; and weaving the stretched fibers on a self-made vascular stent die, connecting the heads of the fibers by using barium sulfate and PCL hollow tubular joints, and performing heat setting on the stent to obtain the vascular stent of which the two ends have the X-ray dominance. The material of the stent has high compatibility with a human body, the prepared stent has stable performance, and the barium sulfate tubular joints at the two ends of the stent have the function of in-vivo X-ray tracing targets, so the stent is convenient to observe and research after being implanted into the human body; and the preparation method is simple and has low cost and good application prospect.

The invention discloses a vein puncture training tool and relates to the field of medical teaching. The tool includes a hand model and a simulation vein vessel. The hand model is composed of a plurality of cotton clothes which are twined together and are put on a latex glove. The simulation vein vessel is adhered to the back of the hand model at interval by an adhesive. The simulation vein vessel is a natural latex tube. According to the invention, the tool can address the problems of complex structure, high exchanging rate caused by susceptibility to damage in training and failure of wide application in medical schools and all levels of medical agencies due to high prices that are common of current vein puncture training tools.

The invention discloses a mobile display table for building design, and relates to the technical field of building design. The mobile display table comprises a supporting table, wherein walking wheelsare rotationally installed at the bottom of the supporting table; a sliding sleeve pipe driven by a height adjusting mechanism is vertically arranged on a stand column in a sliding mode; a containingbasket is fixed at the upper end of a steering shaft; and a bearing plate used for bearing a building model is in driving connection in the containing basket through a lifting mechanism. According tothe mobile display table, the building model designed by the building is stored through the containing basket; the lifting mechanism can drive the bearing plate to ascend and descend to achieve storage and extension of the building model out of the containing basket, so that the display operation of the building model is more flexible; an arranged steering mechanism can drive the containing basket to carry out automatic intermittent rotation through the steering shaft, so that the building model on the bearing plate can realize automatic rotary display; and meanwhile, the rotation intermittent period exists in the rotation process, so that a visitor can observe and study conveniently and carefully, and the display effect of the building design is greatly improved.

The invention belongs to the technical field of toolboxes for teaching aids, in particular to a toolbox for teaching aids for applied mathematics; it includes a box body; a storage cavity is opened inside the box body, and the height of the box body is greater than the length of the box body; The side wall is provided with a sliding slot, and a drawer box is slidably inserted into the sliding slot; the upper end of the box body is connected to the box cover through hinge rotation, and the side wall of the box body is hinged with an L-shaped engaging block through a hinge seat; The horizontal engaging end of the L-shaped engaging block is engaged on the box cover; the drawer box includes a horizontal slide plate, two side baffles and an end engaging plate; both sides of the horizontal slide plate are connected with two side baffles through hinge rotation, and There are T-shaped slots on the front and rear ends of the baffles on both sides; T-shaped engaging strips are provided on the inner wall of the end engaging plate, and the T-shaped engaging strips slide and engage in the T-shaped slots; it is convenient for large and long Long teaching aids are stored, and the folded drawer box can be disassembled and put into the box, while reducing the occupied space of the box.

The invention discloses a high-precision table type rotating ultrasonic rock coring device, and belongs to the technical field of rock coring. The device comprises a supporting assembly, a transmission assembly and an ultrasonic rock breaking assembly. The supporting assembly is located on the outmost side of the whole device, the transmission assembly is located on the upper end in the supportingassembly, the ultrasonic rock breaking assembly is mounted on the lower end in the supporting assembly, the device is scientific and reasonable, use is safe and convenient, ultrasonic vibration is used for carrying out resonance breaking on the rock, compared with a traditional manner that a drill bit drills for coring, the coring efficiency is greatly improved, a rock sample can be subjected tosurface grinding through the device, the surface of a coring sample is flat, the rock sample can enter a coring groove favorably, a related worker can carry out observing and research, when the top end of the coring rock sample reaches the height of a distance sensor, the device can cut off the rock sample, the cut-off rock coring sample can be conveniently taken out by an operator from the top ofa coring groove, and convenience and rapidness are achieved.

The invention relates to a titanium alloy surfacing gas protective cover fixed to a welding gun. The titanium alloy surfacing gas protective cover fixed to the welding gun comprises a base, a fixing cross beam and front covers. The fixing cross beam is arranged in the middle of the base and provided with two side walls used for clamping the welding gun. The front covers are symmetrically arranged on the two sides of the side wall of the fixing cross beam. First gas circuit loops are arranged inside the front covers, and second gas circuit loops nested with the first gas circuit loops are arranged on the base. A threaded hole connected with an external air pipe is formed in the upper portion of each front cover. Gas jet holes are formed in the lower portions of the front covers. According to the titanium alloy surfacing gas protective cover, through symmetrical cavities which are provided with the gas circuit loops and located on the two sides, protective gas is blown out from the gas jet holes in a symmetrical fan shape and located on the same line with a nozzle of the welding gun; the protective cover is erected above a welding bead and covers the whole welding bead from top to bottom, a gas protective film is formed around a whole surfacing layer, the whole surfacing layer is better protected, and the defect that in the prior art, protection of a gas circuit passing through the welding gun is insufficient is overcome; and the structure is simple, the gas protection effect is obvious, and the protection effect in the electric arc surfacing process of titanium alloy is good.

The invention discloses a support system for broken cultural relics, which includes: an inner support module arranged inside the broken cultural relics to support the broken cultural relics from the inside, an outer support buckle detachably connected with the inner support module, and used for fixing the broken cultural relics pieces of connecting fasteners. The inner support module is mainly composed of the main module and several split modules. Each split module is detachably connected with the main module. One end of the outer support buckle is connected with the inner support module, and the other end is set on the inner support module. Below, to support the inner support module, the connecting fastener is connected with the inner support module for fixing the fragments on the inner support module. In this way, each part of the broken cultural relics is connected and assembled with the inner support module in a mechanically detachable manner, without bonding or welding, and can be easily and repeatedly disassembled and assembled, which is convenient for experts and scholars to carry out subsequent research on cultural relics or further maintenance and treatment .

The invention discloses a rock core holder for CT scanning, which comprises a main body, a core placement cylinder is arranged in the middle of the main body, a PLC controller is arranged on the outer surface of the main body, and the input end of the PLC controller is connected with an external power supply. The output end of the main body is electrically connected, the side surface of the main body is provided with a through groove, the inside of the main body is provided with a mounting groove, the inner lower surface of the mounting groove is provided with a first electric telescopic rod, and the telescopic end of the first electric telescopic rod is provided with a second The telescopic rod is provided with a motor inside the telescopic end of the second electric telescopic rod. The core holder used for CT scanning improves the degree of automation, and can automatically fix the core in the core storage tube without causing damage to the core. The core is placed in the core storage tube through the slot, and the first electric telescopic The second electric telescopic rod can be driven up and down, which is convenient for putting the rock core in. The second electric telescopic rod drives the anti-slip block to clamp the rock core through the push block, which improves the clamping stability.

The invention relates to the cytobiology field, and discloses a neuronal cell and neuroglial cell ordered co-culture device and a preparation method and an application thereof. The device includes a substrate and a polydimethylsiloxane stamper, wherein the polydimethylsiloxane stamper can be removably compounded on the substrate; the polydimethylsiloxane stamper includes at least one micropore unit, the micropore unit includes at least one first through hole perpendicular to the substrate and at least one second through hole perpendicular to the substrate, the first through hole and the second through hole are arranged successively, and the first through hole and the second through hole respectively with the surface of the substrate form grooves having one end with an opening; the distance between the first through hole and the second through hole is 500 [mu]m-2000 [mu]m. Neuronal cells and neuroglial cells are inoculated through the first through hole and the second through hole which are perpendicular to the substrate, uniformity of the two kinds of cells is easy to control during inoculation in regions, cell quantity which can be used is increased, a population effect is obvious, and observation and study are facilitated.